Concrete pavement cutting machine

Claim 2

A self-propelled pavement cutting machine comprising a drive truck having a front end, a vehicle having front wheels, rear wheels and an elongated pavement cutter intermediate said front and rear wheels, said cutter extending transversely of the direction of travel, said vehicle having a rear end, an upright sliding coupling between the front end of said drive truck and the rear end of said vehicle, fluid pressure means operative at certain times to raise and support the rear end of said vehicle with its rear wheels and cutter in elevated position and with the front end of said vehicle supported by said front wheels for transportation to another location, said fluid pressure means being operative at other times to lower the rear end of said vehicle for support by its said front and rear wheels and with said cutter in cutting relation with the pavement, and means at each end of said cutter for cOntrolling the depth of cut when said cutter is in operative relation with the pavement.

Claim 3

Machine according to claim 1, said coupling being arranged on opposite sides of the longitudinal center of said truck and vehicle to prevent side sway while said vehicle is being driven by said truck.

Claim 4

Machine according to claim 1, said coupling comprising upright U-channels facing the center line of said truck and vehicle and arranged on opposite sides of said center line, vertically spaced rollers in each of said channels, the front of said truck and the rear of said vehicle each having a frame member, said channels being carried by one of said members and said rollers being carried by the other of said members.

Claim 5

Machine according to claim 1, said truck having only front wheels which are traction wheels driven by an engine on said truck, the rear end of said truck being unsupported by the pavement and tilting up or down substantially like the tilt movement of the rear end of said vehicle when said fluid pressure means is operated.

Claim 6

A concrete cutting machine comprising a drive truck including a set of coaxially arranged drive wheels supporting said truck for movement over pavement, an upright mast on said truck, a vehicle movable over said pavement, said vehicle comprising a frame movable about a horizontal axis, a rotatable cutter carried by said frame, said cutter being rotatable on an axis extending transversely of said vehicle, a carriage carried by said frame adjacent the rear of said frame, said carriage being guided by said mast for movement along said mast, means for moving said carriage along said mast to raise or lower said frame and said cutter about said horizontal axis and relative to said pavement, and means for driving said drive wheels and said cutter.

Claim 7

A concrete cutting machine comprising a drive truck including a set of coaxially arranged drive wheels supporting said truck for movement over pavement, an upright mast on said truck, a vehicle movable over said pavement, said vehicle comprising a frame movable about a horizontal axis, a rotatable cutter carried by said frame, said cutter being rotatable on an axis extending transversely of said vehicle, a carriage carried by said frame adjacent the rear of said frame, said carriage being guided by said mast for movement along said mast, means for moving said carriage along said mast to raise or lower said frame and said cutter about said horizontal axis and relative to said pavement, and means for driving said drive wheels and said cutter.

Claim 8

Machine according to claim 5 wherein said driving means comprises a first motor on said truck for driving said drive wheels and a second motor on said frame for driving said cutter.

Claim 9

Machine according to Claim 5 wherein said vehicle comprises front wheels supporting said frame adjacent the front end of said frame for movement over said pavement and for tilt movement of said vehicle about said front wheels as said carriage moves up and down, and means for steering said front wheels.

Claim 10

Machine according to claim 5 comprising an arm having a pivotal connection with said frame on a horizontal axis vertically above said cutter axis, a wheeled support for said vehicle on said arm on one side of said pivotal connection, said wheeled support having wheels engagable with said pavement intermediate said set of drive wheels and said cutter, and adjustable means to adjustably limit the position of the outer end of said arm to adjust the vertical position of said wheeled support with respect to said cutter.

Claim 11

Machine according to claim 8 comprising means on said frame engagable with the outer portion of one end of said arm for raising said arm and said wheeled support upon raising said frame.

Claim 12

Machine according to claim 8, said adjustable means comprising means providing a recess in which said outer end of said arm is vertically movable, and an adjusting screw to limit the vertical position of said outer end of said arm.

Claim 13

Machine according to claim 8 comprising a second wheeled support for said vehicle on said arm on the other side of said pivotal connection, said second wheeled support being engagable with said pavement on the side of said cutter opposite said first-mentioned wheeled support, and means for adjusting the vertical position of said second wheeled support relative to said pivotal connection.

Claim 14

Machine according to claim 11 comprising means for removably supporting said second wheeled support on said arm.

Claim 15

A concrete cutting machine comprising a drive truck including a set of coaxially arranged drive wheels supporting said truck for movement over pavement, first motor means for driving said drive wheels, an upright mast on said truck, a cutter frame, a set of front wheels supporting said cutter frame adjacent the front thereof for movement over said pavement, a carriage carried by said cutter frame adjacent the rear thereof, means supporting said carriage for movement along said mast, a rotatable cutter carried by said frame intermediate said drive wheels and said front wheels, said cutter being rotatable on an axis extending transversely of the direction of travel, second motor means for rotating said cutter, means for moving said carriage along said mast to raise or lower said frame with said cutter relative to said pavement, an arm having a pivotal connection with said frame on a horizontal axis vertically above said cutter axis, a wheeled support for said frame on said arm between said pivotal connection and an outer end of said arm, said wheeled support having wheels engagable with said pavement intermediate said cutter and said drive wheels, and adjustable stop means between said outer end of said arm and said frame to limit the upward movement of said outer end of said arm to thereby limit the downward movement of said frame and said cutter as said arm partakes of pivotal movement about said wheeled support, said wheeled support having wheels pivotally connected to and arranged at the front and rear of a column fixed to said arm.

Claim 16

A concrete cutting machine comprising a drive truck including a set of coaxially arranged drive wheels supporting said truck for movement over pavement, first motor means for driving said drive wheels, an upright mast on said truck, a cutter frame, a set of front wheels supporting said cutter frame adjacent the front thereof for movement over said pavement, a carriage carried by said cutter frame adjacent the rear thereof, means supporting said carriage for movement along said mast, a rotatable cutter carried by said frame intermediate said drive wheels and said front wheels, said cutter being rotatable on an axis extending transversely of the direction of travel, second motor means for rotating said cutter, means for moving said carriage along said mast to raise or lower said frame with said cutter relative to said pavement, an arm having a pivotal connection with said frame on a horizontal axis vertically above said cutter axis, a wheeled support for said frame on said arm between said pivotal connection and an outer end of said arm, said wheeled support having wheels engagable with said pavement intermediate said cutter and said drive wheels, and adjustable stop means between said outer end of said arm and said frame to limit the upward movement of said outer end of said arm to thereby limit the downward movement of said frame and said cutter as said arm partakes of pivotal movement about said wheeled support, said wheeled support having wheels pivotally connected to and arranged at the front and rear of a column fixed to said arm.